Towing a trailer
126
Further information on the towing device page 126.
Note
We recommend that you also have your vehicle inspected between service inter-
vals if you tow a trailer frequently.
The handbrake on the towing vehicle must be put on when coupling and decou-
pling the trailer.
Driving Tips
Particular caution is required when towing a trailer.– Do not, as far as possible, drive with your vehicle unladen and the trailer laden.
– Do not make full use of the legal maximum speeds. This applies in particular to downhill sections.
– Apply the brakes in good time.
– Keep a check on the coolant temperature gauge if the outside temperature is high.
Distribution of weight
The distribution of the weight is very poor if your vehicle is unladen and the trailer is
laden. Maintain a particularly low speed if you cannot avoid driving with this combina-
tion.
Driving speed
Do not drive faster than 80 km/hour for safety reasons. This also applies for countries
in which higher speeds are allowed.
The fact that the driving stability of the vehicle + trailer combination reduces with
increasing speed means that the legally allo wed speed should not be used when there
are unfavourable road, weather or wind cond itions, particularly near accident black
spots.
You must always reduce your speed immediat ely as soon as you detect even just the
slightest swaying of the trailer. On no account attempt to stop the trailer from
“swaying” by accelerating.
Apply the brakes in good time! If the trailer is fitted with a trailer brake, apply the
brakes gently at first and then brake firmly. This will avoid brake jolts resulting from the trailer wheels locking. Shift down gears in good time before negotiating a downhill
section to allow the engine
to also act as a brake.
Engine overheating
Please keep a check on the coolant temperature gauge if you have to negotiate a
lengthy slope in a low gear at a high engi ne speed when the outside temperature is
very high page 16, “Engine coolant temperature Display”.
If the needle of the coolant temperature gaug e moves into the right-hand area or even
the red area of the scale, reduce your speed immediately. Stop and switch off the
engine if the warning light
in the instrument cluster begins flashing. Wait a few
minutes and check the level of coolant in the coolant expansion bottle page 143,
“Inspecting the coolant level”.
Please refer to the following guidelines page 25, “Coolant temperature/coolant
level ”.
The coolant temperature can be reduced by switching on the heating.
Any increase in the cooling effect of the coolant fan through shifting down a gear and
increasing the engine speed is not possible since the fan speed is independent of the
engine speed. One should also not drop a gear for this reason when towing a trailer as
long as the engine can manage th e slope without any drop in speed.
Detachable towing device*The ball head of the towing device is stowed together with separate fitting instructions
in the spare wheel well in the luggage compartment of the vehicle.
Fig. 118 Detachable ball head
s2bs.2.book Page 126 Monday, September 27, 2010 9:53 AM
Inspecting and replenishing
142
It is normal for the engine to consume oil. The oil consumption may be as much as 0.5
l/1 000 km depending on your style of driving and the conditions under which you
operate your vehicle. The oil consumption may be slightly hi gher than this during the
first 5000 kilometres.
One should therefore check the oil level at regular intervals, preferably every time after
the fuel tank is filled or after driving for long stretches.
We recommend maintaining the oil level within the range - but not above this, if
the engine has been operating at high load s, for example during a lengthy motorway
trip during the summer months, towing a tr ailer or negotiating a high mountain pass.
The warning light in the instrument cluster* will indicate page 25, “Engine oil pres-
sure ” whether the oil level is too low. In this case, check the oil level as soon as
possible. Top up with an appropriate quantity of oil.
Caution
The oil level must on no account extend beyond the range . Danger of damaging
the catalytic converter.
Do not continue your journey if for some reason it is not possible under the
conditions prevailing to top up with oil. Switch the engine off and obtain professional
assistance from a specialist garage, otherwise it could lead to severe engine damage.Note
Engine oil specifications page 179, “Technical Data”.Replenishing engine oil– Inspecting the engine oil level page 141.
– Unscrew the cap of the engine oil filler opening.
– Pour in a suitable grade of oil in portions of 0.5 litres page 180, “Engine oil spec-
ifications”.
– Inspect the oil level page 141.
– Carefully screw on the cap of the filler opening and push the dipstick in fully.
WARNING
Avoid dripping oil onto hot parts of the engine when topping up will oil - a
risk of fire!
Read and observe the warning notes page 140, “Working in the engine
compartment” before working in the engine compartment.For the sake of the environment
The oil level must on no acco unt extend beyond the range page 141. Oil will
otherwise be drawn in through the crankc ase ventilation and may pass through the
exhaust system to atmosphere. The oil ma y combust in the catalytic converter and
damage it.Changing engine oilThe engine oil must be changed at the intervals stated in the Service schedule or
according to the service interval indicator page 17, “Service Interval Display”.
WARNING
Only carry out the engine oil change, if you have the required professional
knowledge!
Read and observe the warning notes page 140, “Working in the engine
compartment” before working in the engine compartment.
First of all, let the engine cool down, we ar an eye protection and gloves - risk
of caustic burns due to hot oil.Caution
You must not pour any additives into the engine oil - risk of engine damage! Damage,
which results from such product, are excluded from the warranty.
For the sake of the environment
You must on no account pour oil into the ground or into the sewage system.
AAAA
AA
s2bs.2.book Page 142 Monday, September 27, 2010 9:53 AM
Inspecting and replenishing
144
– Open the bonnet page 139.
– Check the level of coolant in the coolant expansion bottle page 143, fig. 124 .
The coolant level when the engine is cold must lie between the (MIN) and
(MAX) markings. The level may also rise slightly above the (MAX) marking when
the engine is warm.
If the coolant level in the reservoir is too lo w, this is indicated by the warning light in
the instrument cluster page 25, “Coolant temperature/coolant level ”. We never-
theless recommend inspecting the coolant leve l directly at the reservoir from time to
time.
Loss of coolant
A loss of coolant is first and foremost an indication of a leak in the system. You should
not merely top up the coolant in the reservoir. It is also important to have the cooling
system inspected without delay by a specialist garage.
Losses can only occur through the pressure relief in the cap of the coolant expansion
bottle which is completely free of leaks if the coolant boils as a result of overheating
and is forced out of the cooling system.
WARNING
Read and observe the warning notes page 140, “Working in the engine
compartment” before working in the engine compartment.
Caution
One should contact a specialist garage as soon as possible if the source of overheating
itself cannot be determined and removed, since there may be grave damage to the
engine.Replenishing the coolant– Switch the engine off.
– Allow the engine to cool down.
– Place a cloth over the cap of the coolant expansion reservoir page 143, fig. 124
and unscrew the cap carefully by turning it to the left . –Top up the coolant.
– Screw the cap tight until it is heard to lock.
The coolant which you use for replenishing the system, must comply with one specific
specification
page 143. Do not use an alternative additive if the coolant additive
G13 is not available in an emergency. Just to p up the system with water and as soon as
possible arrange adjustment to correct the mixing ratio of water and coolant additive
again by a specialist garage.
Only use fresh coolant for topping up the system.
Do not fill up over the “MAX” marking! Excess coolant which is heated up is forced out
of the cooling system through the pressure relief valve in the cap of the coolant
compensation bottle.
Wait until the engine has cooled down for a system which has suffered a major loss of
coolant before pouring in coolant. This is necessary to avoid engine damage.
WARNING
The cooling system is pressurized! Do not open the cap of the coolant
expansion bottle if the engine is still hot - risk of scalding!
The coolant additive and thus all of the coolant is harmful to your health.
Avoid contact with the coolant. Coolant vapours are also harmful to the health.
It is important, therefore, to always safely store any coolant additive in its orig-
inal container out of the reach of children - risk of poisoning!
If any splashes of coolant get into yo ur eyes, rinse out your eyes immedi-
ately with clear water and contact a doctor as soon as possible.
You should also consult a doctor without delay if you have inadvertently
swallowed coolant.Caution
Do not continue your journey if for some reason it is not possible under the
conditions prevailing to top up with coolant. Switch the engine off and obtain
professional assistance from a specialist garage, otherwise it could lead to severe
engine damage.
Ab
Aa
Aa
s2bs.2.book Page 144 Monday, September 27, 2010 9:53 AM
Fuses and light bulbs
170
Fuse cover in engine compartmentOn some vehicles, the battery cover must be removed before removing the fuse cover
page 146.Removing fuse cover– Move the circlips fig. 144 as far as the stop, the symbol
appears behind the
circlip and remove the cover.
Installing fuse cover– Position the fuse cover on the fuse box and push the circlips as far as the stop -
the symbol
is visible behind the circlip.
Caution
When unlocking and locking the fuse cover, it must be pressed on the sides to the
box, otherwise damage can occur to the locking mechanism.
Carefully position the fuse cover in the engine compartment. If the cover was not
correctly positioned, water can get into the fuses and this results in a damage to the
vehicle!
Fuse assignment in engine compartmentCertain electrical components are only stan dard on certain vehicle model versions or
only suppliable as optional equipment for certain models.
Fig. 144 Fuse cover in engine compart-
ment
AA
AA
No.
Power consumer
Amperes
F1
Not assigned
F2
Control unit for automatic gearbox DQ 200
30
F3
Measuring circuit
5
F4
Valves for ABS
30/20
F5
Control unit for automatic gearbox
15
F6
Instrument cluster, windshield wiper lever and turn signal
light lever
5
F7
Power supply for terminal 15 (ignition on), starter
40
F8
Radio
15
F9
Phone
5
F10
Engine control unit, Main relay
5/10
F11
Control unit for auxiliary heating
20
F12
Control unit for CAN databus
5
F13
Engine control unit
15/30
F14
Ignition
20
Fig. 145 Schematic representation of
fuse carrier in engine compartment
s2bs.2.book Page 170 Monday, September 27, 2010 9:53 AM
Fuses and light bulbs171
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Fuse assignment in the dash panelCertain electrical components are only stan dard on certain vehicle model versions or
only suppliable as optional equipment for certain models.
F15
Lambda probe
glow plug system relay
10
5
F16
Central control unit, right main headlight, right rear light
unit
30
F17
Horn
15
F18
Amplifier for digital sound processor
30
F19
Front window wiper
30
F20
Wa te r pump
valve for fuel dosing
High-pressure pump
10
20
15
F21
Lambda probe
Vacuum pump
10/15 20
F22
Clutch pedal switch, brake pedal switch
5
F23
Secondary air pump
Air mass meter
Fuel high pressure pump
5
10
15
F24
Activated charcoal filter, exha ust gas recirculation valve,
radiator fan
10
F25
Pump for ABS
30/40
F26
Central control unit, left main headlight, left rear light unit
30
F27
Secondary air pump
Glow plug system
40
50
F28
Not assigned
F29
Power supply terminal 30 (con tinuous current supply from
the battery)
50
F30
Te r m i n a l X
a)
50
a)In order not to drain the battery unnecessarily wh en starting the engine, the electrical compo-
nents of this terminal are automatically switched off.No.
Power consumer
Amperes
No.
Power consumer
Amperes
1
Diagnostic socket, Engine control unit, Electrical fuel
pump
10
2
Control unit for ABS, ESP
5
3
Airbag
5
4
Heating, air conditioning, reve rsing lights, interior rear
view mirror dimming, te lephone preinstallation
5
5
Control unit for headlamp beam adjustment
5
6
Instrument cluster, Control unit for automatic gearbox,
Control unit for electromechanical power steering, Parking
aid; Haldex clutch
5
7
Not assigned
8
Not assigned
9
Not assigned
10
Not assigned
11
Not assigned
12
Central locking control unit
10
Fig. 146 Schematic representation of
the fuse carrier in the dash panel
s2bs.2.book Page 171 Monday, September 27, 2010 9:53 AM
Index191
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Front armrest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Diesel fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Fuel gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Petrol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Fuel consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 Saving energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Fuel gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Fuel reserve Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Full wheel trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
GGauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
General view Cockpit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Glow plug system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25HHandbrake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Hazard warning light system . . . . . . . . . . . . . . . . . . . 44Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Head airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Head restraint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Headlight flasher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Headlights Fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Heated windscreen washer nozzles . . . . . . . . . . . . 47 Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Defrosting windows . . . . . . . . . . . . . . . . . . . . . . . 72
Recirculated air mode . . . . . . . . . . . . . . . . . . . . . 73
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
IIgnition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Ignition lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Immobiliser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Instrument cluster . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Interior light Luggage compartment . . . . . . . . . . . . . . . . . . . . . 46
Interior lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Interior mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Interior monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Intermittent wiping . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
ISOFIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
ISOFIX system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108JJacking points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Jump-starting . . . . . . . . . . . . . . . . . . . . . . . . . . . 165, 166KKey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30LLashing eyes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Leather care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134 Lifting jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159, 164
Lighting of the interior of the vehicle . . . . . . . . . . . . 45
Lights
Changing bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . 172
converting/masking over . . . . . . . . . . . . . . . . . 123
Range adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 43
switching on and off . . . . . . . . . . . . . . . . . . . . . . . 42
Warning lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Lights and Visibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Lock Central locking system . . . . . . . . . . . . . . . . . . . . . 33
lock Central locking system . . . . . . . . . . . . . . . . . . . . . 33
Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Locking and unlocking from inside . . . . . . . . . . . . . 33
Low beam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Lugagge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Luggage compartment . . . . . . . . . . . . . . . . . . . . . 35, 57 Folding hooks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Lashing eyes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Luggage rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
MMain beam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42, 44 Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Manual shifting of gears . . . . . . . . . . . . . . . . . . . . . . . 80
Memory for the on-board computer . . . . . . . . . . . . 18
Mobile phone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Motoring abroad . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
s2bs.2.book Page 191 Monday, September 27, 2010 9:53 AM